CN201578941U - Flue gas dust removing device and flue gas oxygen content measuring system - Google Patents

Flue gas dust removing device and flue gas oxygen content measuring system Download PDF

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Publication number
CN201578941U
CN201578941U CN2010200467904U CN201020046790U CN201578941U CN 201578941 U CN201578941 U CN 201578941U CN 2010200467904 U CN2010200467904 U CN 2010200467904U CN 201020046790 U CN201020046790 U CN 201020046790U CN 201578941 U CN201578941 U CN 201578941U
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China
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dust
flue gas
flue
urceolus
oxygen content
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CN2010200467904U
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Chinese (zh)
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赵振宁
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华北电力科学研究院有限责任公司
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Abstract

The utility model relates to a flue gas dust removing device. The device is provided with a body which is provided with a flue gas inlet and a clean flue gas outlet, and is characterized in that an open dust outlet is arranged at the lower end of the body of the flue gas dust removing device. The flue gas dust removing device provided by the utility model is applicable to various systems needing dust removal processing for flue gas and the like, has simple and practical structure and higher dust removing efficiency, can satisfy the requirements of various kinds of subsequent processing (particularly, flue gas detection) for flue gas dust removal, can well avoid dust pollution for detecting elements particularly in the detecting process and ensures the accuracy of a detected result. The utility model also provides a flue gas oxygen content measuring system which is provided with the flue gas dust removing device.

Description

Fume dust remover and flue gas oxygen content measurement system

Technical field

The utility model relates to a kind of fume dust remover, relates in particular to a kind of dust arrester that flue gas is handled that is applicable to; The utility model also relates to the flue gas oxygen content measurement system that contains this fume dust remover.

Background technology

In boiler smoke discharging, flue gas being carried out step such as oxygen content detection is necessary process before the fume emission, and these steps mostly have strict requirement to the dust content in the flue gas.In order to make flue gas be fit to the steps such as detection that flue gas is carried out, avoid detecting instrument is produced pollution, influence testing result, in present production, the example of the separation of the solid in the air-flow such as the sampling of coal dust, the main whirlwind molecular separator that adopts, as shown in Figure 1: flue gas enters the sub-dust arrester body interior of whirlwind by inlet 101, turn to after running into inwall, dust with process that inwall contacts in and the bottom of in the process of device internal operation, falling body gradually, discharge by outlet at bottom 103, outlet at bottom 103 places generally be the sealing or be connected with dismountable solid particle gatherer, the gas that removes dust then leaves the sub-dust arrester of whirlwind by exporting 102.But when adopting this device, gatherer will soon be filled, thereby is not suitable for flue gas (especially need detect flue gas) is carried out dust removal process.

In flue gas oxygen content detects, often adopt zirconia probe to carry out at present.Zirconia probe is swift in response as a kind of measure of oxygen content element, and maintenance is little.As shown in Figure 7, the flue gas that produces in the burner hearth 701 of boiler, through after the back-end ductwork 702, enter air preheater 704 by air preheater gas approach 703, after air preheater exhaust pass 705, enter in the atmosphere through deduster 706, air-introduced machine 707 and chimney 708 successively, the flue of flue gas process is a flue collector.Zirconia probe 709 is measured oxygen content in the sidewall insertion flue gas of air preheater gas approach 703 positions by flue collector.

In flue gas oxygen content measurement system, zirconia probe must be placed main smoke airflow just can measure oxygen content exactly, but the length of zirconia probe is approximately 1m, and the width of flue collector reaches tens meters, so be difficult to zirconia probe is arranged in main smoke airflow or the full-power primary air, thereby the accuracy of zirconia probe oxygen determination amount is relatively poor; And modern heavy duty boiler flue flow area is very big, often turns round again, so speed is inhomogeneous in the flue flow area, also may there be eddy current in the subregion, has influenced the measurement of oxygen content in the flue gas.

The utility model content

For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of fume dust remover, and this dust arrester is simple in structure, efficiency of dust collection is high, can protect detecting element well, avoids it contaminated and influence the degree of accuracy of measurement result.

For solving the problems of the technologies described above, the purpose of this utility model also is to provide a kind of flue gas oxygen content measurement system, and this system can avoid dust in undesired situation of flue gas and the flue gas to the influence of the measurement result of zirconia probe.

For achieving the above object, the utility model at first provides a kind of fume dust remover, has a body that is provided with smoke inlet and clean exhanst gas outlet, it is characterized in that the lower end of the body of this fume dust remover has an open dust export.

Fume dust remover provided by the utility model is different with existing dust arrester, the dust export that its lower end had is the outlet of an opening, and nonocclusive outlet, can make the dust in the flue gas waltz through this dust export discharge dust arrester like this, avoid producing and stop up.

In the above-mentioned fume dust remover that the utility model provides, preferably, described dust export place is provided with the rib ring, and described rib ring has the spring leaf that is provided with along its tangential direction.

The fume dust remover that the utility model provides can be the sub-dust arrester of whirlwind with above-mentioned feature, promptly in the bottom of the sub-dust arrester of existing whirlwind open dust export is set, and at the dust export place rib ring and spring leaf is set then.In the above-mentioned fume dust remover that the utility model provides, the rib ring can be fixed on the dust export place by support, and spring leaf tangentially is provided with (can be welding) on the rib ring.Spring leaf can be swung under the effect of flue gas or wind etc., thereby make the rib ring produce vibration, can shake the dust of piling up on the rib ring, can avoid causing the obstruction of dust export better, the fume dust remover that the utility model is provided can be applied to the dust removal process of flue gas (especially need detect flue gas) more continuously, efficiently.

According to concrete technical scheme of the present utility model, above-mentioned fume dust remover can also be fume dust remover with following structure (or is called avette dust arrester, but its shape is not limited to avette completely).Preferably, in this fume dust remover, described body comprises urceolus and inner core, wherein:

Described smoke inlet is arranged on the upper end of described urceolus, and described dust export is arranged on the lower end of described urceolus;

Described inner core is connected with described urceolus by first support; The bottom of described inner core is positioned at described urceolus inside, and the top of described inner core is passed described smoke inlet and stretched out described urceolus and form clean exhanst gas outlet.

In above-mentioned avette dust arrester, the flue gas that contains dust can enter dust arrester inside by the smoke inlet of urceolus upper end, under inertia and gravity effect, most dust and flue gas can directly be discharged from the dust export of lower end, a spot of dust and flue gas can enter in the circulation passage of inner core simultaneously, by clean exhanst gas outlet is connected with other pipelines, this part of smoke can be guided to and detect in the flue gas detecting element or carry out other processing.This part flue gas contains less dust, is suitable for carrying out various detections, can avoid detecting element is exerted an influence, and guarantees the accuracy of testing result.In above-mentioned avette dust arrester, the rib ring can be fixed on the described urceolus by second support.

In above-mentioned avette dust arrester, preferably, described urceolus is spherical a, elliposoidal or cylindrical etc.; Perhaps, the top of described urceolus is hemispherical or semielliptical shape, and the bottom is cylindrical etc.Urceolus has the structure of above-mentioned lower dimension greater than upper dimension, flue gas is entered after the avette dust arrester by smoke inlet, along with the inside dimension of avette dust arrester increases gradually, dust in the flue gas can break away from flue gas better and fall, and leaves above-mentioned avette dust arrester by the dust export of urceolus lower end; The flue gas that has removed dust then can enter inner core more apace, and flows in other pipelines by the circulation passage in the inner core, to carry out follow-up detection etc.

In above-mentioned avette dust arrester, preferably, the top of described inner core is tubulose, and the bottom is spherical a, elliposoidal or cylindrical etc.

The fume dust remover that the utility model provides can be applicable to various need carrying out in the system of dust removal process flue gas etc., and wherein, the sub-ash handling equipment of whirlwind is fit to level and advances flue gas, and avette dust arrester is fit to vertical underriding direction and advances flue gas.This fume dust remover simple and practical, have higher efficiency of dust collection, can satisfy the requirement of various subsequent treatment (especially flue gas detection), especially in testing process for flue gas ash removal, can avoid detecting element to be subjected to contamination by dust well, guarantee the degree of accuracy of testing result.

The utility model also provides a kind of flue gas oxygen content measurement system, and it comprises:

Flue collector and air preheater, described air preheater are arranged in the described flue collector;

Dust arrester, described dust arrester is arranged in the described flue collector, and is positioned at the top of described air preheater, is used for gathering flue gas to be measured from the flue collector of described air preheater front end, and described flue gas to be measured is carried out ash disposal handle;

The bypass flue, the inlet of described bypass flue is connected with the clean exhanst gas outlet of described dust arrester, the outlet of described bypass flue is connected with described flue collector, is used for the flue gas described to be measured after the described dust arrester ash disposal processing is sent into the flue collector of described air preheater rear end;

The measure of oxygen content device is used for detecting the oxygen content of described bypass flue flue gas to be measured, and with the oxygen content data output that detects; Wherein:

Described dust arrester is an above-mentioned fume dust remover provided by the utility model.

In the flue gas oxygen content measurement system that the utility model provides, the outlet of fume dust remover is connected with the inlet of bypass flue, and the smoke inlet of fume dust remover opens in the flue collector.

In the flue gas oxygen content measurement system that the utility model provides, preferably, the body of described fume dust remover comprises urceolus and inner core, and described smoke inlet is arranged on the upper end of described urceolus, and described dust export is arranged on the lower end of described urceolus; Described inner core is connected with described urceolus by first support; The bottom of described inner core is positioned at described urceolus inside, and the top of described inner core is passed described smoke inlet and stretched out described urceolus and form clean exhanst gas outlet; Described dust export place is provided with the rib ring, and described rib ring has the spring leaf that is provided with along its tangential direction; The clean exhanst gas outlet of described fume dust remover is connected with the inlet of described bypass flue.

In the flue gas oxygen content measurement system that the utility model provides, preferably, described measure of oxygen content device is a zirconia probe.

In the flue gas oxygen content measurement system that the utility model provides, preferably, described fume dust remover is positioned at the center of described flue collector.

In the flue gas oxygen content measurement system that the utility model provides, preferably, the outlet of described bypass flue is arranged in the flue collector of described air preheater rear end.

The above-mentioned flue gas oxygen content measurement system that adopts that the utility model provides, the influence that can avoid that flue is wide, velocity of flue gas is inhomogeneous etc. and detect for the oxygen amount guarantees the degree of accuracy of testing result; Simultaneously, by the fume dust remover that in this flue gas oxygen content measurement system, adopts the utility model to provide, can avoid the influence of dust well to measure of oxygen content device (for example zirconia probe) etc.

Description of drawings

The following drawings only is intended to the utility model done and schematically illustrates and explain, does not limit scope of the present utility model.Wherein:

Fig. 1 is the structural representation of the sub-dust arrester of existing whirlwind;

The structural representation of the avette dust arrester that Fig. 2 provides for embodiment 1;

The urceolus dust export structural representation of the avette dust arrester that Fig. 3 provides for embodiment 1;

Fig. 4 is rib ring and spring leaf connection diagram;

The urceolus and the inner core syndeton schematic diagram of the avette dust arrester that Fig. 5 provides for embodiment 1;

The structural representation of the avette dust arrester that Fig. 6 provides for embodiment 2;

Fig. 7 is the structural representation of existing flue gas oxygen content measuring system;

The structural representation of the flue gas oxygen content measuring system that Fig. 8 provides for embodiment 3;

The structural representation of the sub-dust arrester of whirlwind that Fig. 9 provides for embodiment 4;

The structural representation of the flue gas oxygen content measuring system that Figure 10 provides for embodiment 5.

The specific embodiment

Understand for technical characterictic of the present utility model, purpose and beneficial effect being had more clearly, the technical solution of the utility model is carried out following detailed description, but but can not be interpreted as qualification practical range of the present utility model referring now to Figure of description.

Embodiment 1 avette dust arrester

The structural representation of the avette dust arrester that Fig. 2 provides for present embodiment.As shown in Figure 2, the avette dust arrester that present embodiment provides has an avette body, and it comprises urceolus 201 and inner core 202, and wherein: urceolus 201 is an elliposoidal, and its upper end has a smoke inlet 203, and its lower end has a dust export 204;

The bottom of inner core 202 is an elliposoidal, is positioned at urceolus 201 inside, and the top of inner core 202 is tubulose, stretches out urceolus 201 and forms clean exhanst gas outlet 205 by smoke inlet 203;

The urceolus dust export structural representation of the avette dust arrester that Fig. 3 provides for present embodiment.As shown in Figure 3, dust export 204 places are provided with a plurality of rib rings 207, and these rib rings 207 are fixed to dust export 204 places by second support 209; Tangential direction at rib ring 207 is provided with a plurality of spring leafs 208;

When dust and flue gas after urceolus 201 inside fall, be easy to pile up at dust export 204 places, stop up dust export 204 gradually; Spring leaf 208 externally air-flow effect produces swing or vibration down, causes the vibration of rib ring 207, thereby the shakes such as dust of piling up on it can be fallen, and avoids it to stop up dust export 204, as shown in Figure 4.

The urceolus and the inner core syndeton schematic diagram of the avette dust arrester that Fig. 5 provides for present embodiment.As shown in Figure 5, inner core 202 is connected with urceolus 201 by first support 206, and the smoke inlet 203 of the top of inner core 202 by urceolus 201 upper ends stretches out the clean exhanst gas outlet 205 of its end formation.

When adopting this avette dust arrester to carry out dedusting, undressed flue gas enters urceolus 201 by smoke inlet 203, because urceolus 201 is an elliposoidal, its size becomes greatly gradually, causes the flue gas circulation passage to become big, under action of inertia, most of dust and flue gas are directly discharged from the dust export 204 of urceolus 201 bottoms, have small amount of dust and flue gas can enter into inner core 202 simultaneously, flow along its internal fluid passageways, final by clean exhanst gas outlet 205 discharges, enter follow-up pipeline.Adopt this avette dust arrester to carry out dedusting, its efficiency of dust collection can reach 66.7%.

Embodiment 2 avette dust arresters

The structural representation of the avette dust arrester that Fig. 6 provides for embodiment 2.As shown in Figure 6, this avette dust arrester has an avette body, it comprises urceolus 201 and inner core 202, the two links together by the support (not shown), wherein: the top of urceolus 201 is semielliptical shape, the bottom is cylindrical, and the upper end of urceolus 201 has a smoke inlet 203, and its lower end has a dust export 204;

The bottom of inner core 202 is an elliposoidal, is positioned at urceolus 201 inside, and the top of inner core 202 is tubulose, stretches out urceolus 201 and forms clean exhanst gas outlet 205 by smoke inlet 203;

In this avette dust arrester, the dust export 204 of urceolus 201 lower ends is bigger, can not produce the phenomenon that dust blocks, and therefore, these dust export 204 places can not be provided with anti-block apparatus such as rib ring and spring leaf.Adopt this avette dust arrester to carry out dedusting, its efficiency of dust collection can reach 98.0%.

Embodiment 3 is provided with the flue gas oxygen content measurement system of avette dust arrester

The structural representation of the flue gas oxygen content measuring system that Fig. 8 provides for present embodiment.Fig. 8 only shows the flue collector part before and after Fig. 7 air preheater, improves on the basis of Fig. 7.The flue gas oxygen content measuring system comprises dust arrester 302, bypass flue 303 and measure of oxygen content device, and the oxygen content measurement device can be zirconia probe 301, and the utility model is not limited thereto.

In the present embodiment, the avette dust arrester that dust arrester 302 is provided for embodiment 1, it is installed near the inlet (front end) of the air preheater 306 in the flue collector 305, the inlet of bypass flue 303 is connected with the exhanst gas outlet of dust arrester 302, with fixing dust arrester 302, bypass flue 303 vertically inserts flue collector 305 inside by the sidewall of flue collector 305, can be by the position of depth adjustment dust arrester 302 in flue collector 305 of bypass flue 303 insertion flue collectors 305.Preferably, dust arrester 302 is positioned at the center of flue collector 305.

Zirconia probe 301 inserts in the bypass flue 303 by the sidewall of bypass flue 303, can fix by welding or nut.As long as the mode that zirconia probe 301 inserts bypass flue 303 can make zirconia probe be arranged in bypass flue 303; Because the diameter very little (being approximately 100mm) of bypass flue 303 generally will vertically insert zirconia probe 301 along bypass flue 303.

The outlet of bypass flue 303 is positioned near the outlet of air preheater 306.After air-introduced machine 707 started, flue gas was in the draft effect current downflow of air-introduced machine 707, and flue gas forms pressure differential through behind the air preheater, made near the pressure of inlet of air preheater 306 export near pressure greater than air preheater.Dust arrester 302 is installed near the inlet of air preheater 306, and the outlet of bypass flue 303 is positioned near the outlet of air preheater 306, so there is pressure differential in the outlet of the inlet of dust arrester 302 and bypass flue 303.Flue gas in the flue collector 305 enters dust arrester 302 in the action of pressure lower part.

302 pairs of flue gases that enter of dust arrester carry out ash disposal, and the described flue gas after the ash disposal is sent into described bypass flue; And the dust of removing in the flue gas will be discharged by the outlet at bottom of dust arrester 302.

After the flue gas of process dust arrester 302 ash disposal enters bypass flue 303, will be through zirconia probe 301, zirconia probe 301 is measured the oxygen content of the described flue gas after the ash disposal in described bypass flue.Zirconia probe is an intelligence sensor, measures difference in oxygen concentration between electromotive force E, and difference in oxygen concentration between electromotive force E is transferred to computer 304 shows, tabling look-up according to the mapping table of difference in oxygen concentration between electromotive force E and oxygen content obtains oxygen content in the flue gas.

The useful technique effect of present embodiment: dust arrester is located at the inlet of air preheater, and the outlet of bypass flue is positioned at the outlet of air preheater, can utilize the pressure differential difference of air preheater gateway that flue gas is sent in the dust arrester; Utilize the technical scheme of present embodiment, can avoid zirconia probe, accurately measure the oxygen content of flue gas by contamination by dust; Can burn the exactly control of air quantity.

The sub-dust arrester of embodiment 4 whirlwind

The structural representation of shown in Figure 9 the is sub-dust arrester of whirlwind that present embodiment provides.The sub-dust arrester of this whirlwind is to obtain by improvement on the basis of the sub-dust arrester of existing whirlwind, the difference of itself and the sub-dust arrester of existing whirlwind shown in Figure 1 is: the body bottom of the sub-dust arrester of whirlwind that present embodiment provides has an open dust export 903, and these dust export 903 places are provided with the rib ring, and (set-up mode is identical with embodiment 1, referring to Fig. 9), has the anti-blocking spring leaf 904 that is provided with along its tangential direction on the rib ring, in addition, the body of the sub-dust arrester of this whirlwind also has for containing the smoke inlet 901 that the dust flue gas enters, and the clean exhanst gas outlet 902 that leaves for the clean flue gas that removes dust.

Embodiment 5 is provided with the flue gas oxygen content measurement system of the sub-dust arrester of whirlwind

The structural representation of the flue gas oxygen content measuring system that Figure 10 provides for present embodiment, wherein, the sub-dust arrester of whirlwind that dust arrester is provided for embodiment 4, the flue gas level enters the sub-dust arrester of whirlwind, dust breaks away from flue gas gradually in the sub-dust arrester of whirlwind inside and falls, and enters in the flue collector by dust export, and the clean flue gas that has removed dust then enters bypass flue inside by the clean exhanst gas outlet on top, contact with zirconia probe then, realize the measurement of flue gas oxygen content.

Claims (10)

1. fume dust remover has a body that is provided with smoke inlet and clean exhanst gas outlet, it is characterized in that the lower end of the body of this fume dust remover has an open dust export.
2. fume dust remover as claimed in claim 1 is characterized in that, described dust export place is provided with the rib ring, and described rib ring has the spring leaf that is provided with along its tangential direction.
3. fume dust remover as claimed in claim 2 is characterized in that described body comprises urceolus and inner core, wherein:
Described smoke inlet is arranged on the upper end of described urceolus, and described dust export is arranged on the lower end of described urceolus;
Described inner core is connected with described urceolus by first support; The bottom of described inner core is positioned at described urceolus inside, and the top of described inner core is passed described smoke inlet and stretched out described urceolus and form clean exhanst gas outlet.
4. fume dust remover as claimed in claim 3 is characterized in that, described urceolus is spherical, elliposoidal or cylindrical.
5. fume dust remover as claimed in claim 3 is characterized in that, the top of described urceolus is hemispherical or semielliptical shape, and the bottom is cylindrical.
6. fume dust remover as claimed in claim 3 is characterized in that, the top of described inner core is tubulose, and the bottom is spherical, elliposoidal or cylindrical.
7. a flue gas oxygen content measurement system is characterized in that, this flue gas oxygen content measurement system comprises:
Flue collector and air preheater, described air preheater are arranged in the described flue collector;
Dust arrester, described dust arrester is arranged in the described flue collector, and is positioned at the top of described air preheater, is used for gathering flue gas to be measured from the flue collector of described air preheater front end, and described flue gas to be measured is carried out ash disposal handle;
The bypass flue, the inlet of described bypass flue is connected with the clean exhanst gas outlet of described dust arrester, the outlet of described bypass flue is connected with described flue collector, is used for the flue gas described to be measured after the described dust arrester ash disposal processing is sent into the flue collector of described air preheater rear end;
The measure of oxygen content device is used for detecting the oxygen content of described bypass flue flue gas to be measured, and with the oxygen content data output that detects; Wherein,
Described dust arrester is the described fume dust remover of claim 1.
8. flue gas oxygen content measurement as claimed in claim 7 system is characterized in that the body of described fume dust remover comprises urceolus and inner core, and described smoke inlet is arranged on the upper end of described urceolus, and described dust export is arranged on the lower end of described urceolus; Described inner core is connected with described urceolus by first support; The bottom of described inner core is positioned at described urceolus inside, and the top of described inner core is passed described smoke inlet and stretched out described urceolus and form clean exhanst gas outlet; Described dust export place is provided with the rib ring, and described rib ring has the spring leaf that is provided with along its tangential direction; The clean exhanst gas outlet of described fume dust remover is connected with the inlet of described bypass flue.
9. flue gas oxygen content measurement as claimed in claim 7 system is characterized in that described fume dust remover is positioned at the center of described flue collector.
10. flue gas oxygen content measurement as claimed in claim 7 system is characterized in that the outlet of described bypass flue is arranged in the flue collector of described air preheater rear end.
CN2010200467904U 2010-01-07 2010-01-07 Flue gas dust removing device and flue gas oxygen content measuring system CN201578941U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010200467904U CN201578941U (en) 2010-01-07 2010-01-07 Flue gas dust removing device and flue gas oxygen content measuring system

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Application Number Priority Date Filing Date Title
CN2010200467904U CN201578941U (en) 2010-01-07 2010-01-07 Flue gas dust removing device and flue gas oxygen content measuring system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594773A (en) * 2016-11-22 2017-04-26 重庆代发铸造有限公司 Recovery type coal-fired boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594773A (en) * 2016-11-22 2017-04-26 重庆代发铸造有限公司 Recovery type coal-fired boiler

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Effective date of registration: 20131029

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: North China Electrical Power Research Institute LLC

Address before: 100045 Beijing Fuxingmenwai Di Zang an Nan Xiang No.

Patentee before: North China Electrical Power Research Institute LLC

Effective date of registration: 20131029

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: North China Electrical Power Research Institute LLC

Address before: 100045 Beijing Fuxingmenwai Di Zang an Nan Xiang No.

Patentee before: North China Electrical Power Research Institute LLC

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